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Title

Montesano Groundwater Investigation of Leaking Underground Storage Tanks, October 2004 and March 2005

 
Publication number Date Published
06-03-008January 2006
VIEW NOW Montesano Groundwater Investigation of Leaking Underground Storage Tanks, October 2004 and March 2005 (Number of pages: 25) (Publication Size: 728KB)




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Author(s) Marti, P.
Description During October 2004 and March 2005, groundwater samples from monitoring wells in downtown Montesano were collected for benzene, toluene, ethylbenzene, and xylene (BTEX) and total petroleum hydrocarbons as gasoline (TPH-G).

High concentrations of gasoline-range petroleum hydrocarbons were detected in wells from three areas identified as potential sources: Tony’s Short Stop/Grays Harbor Grange, Key Bank (Sterling)/Whitney’s Inc., and Brumfield-Twidwell.

Benzene concentrations did not meet (exceeded) the Model Toxics Control Act Method A cleanup standard of 5 ug/L in 10 of the 32 wells, with concentrations ranging from 5.1 to 8500 ug/L. TPH-G concentrations exceeded the standard of 800 ug/L in nine wells, with concentrations ranging from 1100 to 81,000 ug/L.
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Contact Joan LeTourneau at 360-407-6764 or jlet461@ecy.wa.gov
Keywords Model Toxic Control Act, investigation, samples, storage, toxics, results, Grays Harbor, wells, tanks, underground storage tank, model toxics control act, groundwater
WATERSHED Water Resource Inventory Area 22 Lower Chehalis
DATA Environmental Information Management (EIM) #PMART004

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